Most people with COPD can fly. The ones who run into trouble have usually not been told they would need oxygen at altitude, or have flown while still recovering from a flare-up.
Both are avoidable. The deciding questions are about how your lungs cope with less oxygen, and a clinician can answer them before you book rather than at 35,000 feet.
What the cabin does to lungs with COPD
A commercial cabin is pressurised to the equivalent of roughly 6,000 to 8,000 feet. At that cabin altitude there is less oxygen in every breath. A healthy adult’s oxygen saturation typically drops to around 90 per cent for the duration of the flight, and they notice nothing.
Someone with COPD starts lower. Their lungs are already less efficient at moving oxygen into the blood, and the same fall in cabin oxygen takes a larger bite out of a smaller reserve. Some people tolerate it well. Others become breathless, drowsy or confused, and on a long flight the effect builds rather than settles.
Trapped air is the second issue. Gas expands as pressure falls, and that includes air in large bullae, the thin-walled air spaces some people with advanced COPD develop. Published respiratory guidance commonly treats large bullae and any previous pneumothorax (collapsed lung) as reasons for specialist advice before flying.
The airport is the third part of the journey people forget. Long walks between gates, queues and carrying bags are often harder than the flight itself. Assistance can be booked in advance, and for many people with COPD it should be.
Who should be assessed before flying
Published guidance, including the British Thoracic Society’s clinical statement on air travel, commonly recommends an assessment before flying for people with COPD who:
- already use oxygen at home
- have low oxygen saturations at rest
- become very breathless walking a short distance on the flat
- have had a recent flare-up or hospital admission
- had breathing problems on a previous flight
- have other conditions affecting the heart or lungs
The assessment starts with saturations and a history, and a simple practical check: can you walk about fifty metres, or climb a flight of stairs, at your normal pace without becoming severely breathless? Where the picture is borderline, a hypoxic challenge test simulates the cabin on the ground by having you breathe a reduced-oxygen mixture while your saturations are measured. It answers whether you need oxygen in flight, and how much.
If you already use oxygen on the ground, you will need more of it at altitude, not the same amount. If you are someone whose COPD makes you sensitive to too much oxygen, the flow rate needs to be set by your respiratory team, not guessed.
Arranging oxygen for the flight
Supplemental oxygen on a commercial flight is an arrangement, not something sorted at the airport. Airlines commonly offer one of two routes. Some supply oxygen themselves, usually with notice and sometimes for a charge. Many allow an approved portable oxygen concentrator, with batteries to cover the flight plus a margin for delays, and the airline sets the rule. Passengers generally cannot bring their own cylinders.
Either way, the airline will usually ask for airline medical clearance, with a form completed by your doctor. Start this when you book, because the lead time can be longer than people expect.
The airline’s oxygen covers the aircraft only. Oxygen at the departure airport, during a connection and at your destination has to be arranged separately, usually through your home oxygen supplier or a provider at the other end.
Keep inhalers in hand luggage, along with any rescue pack of steroids and antibiotics your team has given you. Declare COPD to your travel insurer if the policy asks about pre-existing conditions.
After a flare-up
A flare-up, or exacerbation, is the time most likely to go wrong. Often it is triggered by an infection, and the same questions apply as in flying with a chest infection: is it resolving, is there a fever, is oxygen needed at rest, and can you walk a reasonable distance?
There is no fixed number of days to wait. The usual principle is to be back to your normal level of breathlessness, sputum and saturations, and off any extra oxygen or rescue treatment, before flying, and to be reassessed if the flare-up needed a hospital stay. After a pneumothorax, published guidance commonly attaches a defined waiting period once the lung has re-expanded. Your respiratory team will tell you what applies.
What this means if you are managing a case
A traveller with COPD admitted abroad with an exacerbation is a familiar respiratory repatriation case, and it has a characteristic risk. The patient looks well enough on the ward on low-flow oxygen, and nobody calculates what they will need at altitude.
The assessment that prevents it covers saturations on exertion, the oxygen requirement at rest, a view on whether the exacerbation has genuinely resolved, and the patient’s usual baseline at home. A seated flight with oxygen and a medical escort suits many of these patients. Where the oxygen requirement is substantial, or the patient cannot sit up comfortably, a stretcher or dedicated aircraft changes the proposition, and the comparison in what a medical repatriation actually costs is worth making honestly.
Home oxygen, the GP and the respiratory team at the receiving end need to be lined up before departure. The general framework is in medical repatriation and patient transport, and the ordering principle is the one in what good repatriation actually looks like: the clinical picture chooses the transport.
